fix: address code review feedback (batch 2)

1. Add logger to writeCacheFile (version-cache.ts)
   - Now logs warnings when file write fails
   - Helps debugging in production environments

2. Sanitize logging in parseGroupResult (communities.ts)
   - Changed from info to debug level
   - Removed full node/groupNode dumps (sensitive data)
   - Now only logs nodeTag and groupId

3. Add input validation in parseNewsletterCreateResponse (newsletter.ts)
   - Validates response structure before destructuring
   - Adds fallback values for parseInt (prevents NaN)
   - Adds null checks for optional fields

4. Add health-status.ts module
   - getHealthStatus(): Full health check with circuit breakers, cache, memory
   - isHealthy(): Simple boolean for liveness probes
   - getSimpleHealthStatus(): Returns 'ok', 'degraded', or 'error'
   - Useful for k8s probes and monitoring dashboards

src/Socket/communities.ts

@@ -78,11 +78,11 @@ export const makeCommunitiesSocket = (config: SocketConfig) => {
 	}
 
 	async function parseGroupResult(node: BinaryNode) {
-		logger.info({ node }, 'parseGroupResult')
+		logger.debug({ nodeTag: node.tag }, 'parseGroupResult')
 		const groupNode = getBinaryNodeChild(node, 'group')
 		if (groupNode) {
 			try {
-				logger.info({ groupNode }, 'groupNode')
+				logger.debug({ groupId: groupNode.attrs?.id }, 'parsing group metadata')
 				const metadata = await sock.groupMetadata(`${groupNode.attrs.id}@g.us`)
 				return metadata ? metadata : Optional.empty()
 			} catch (error) {

src/Socket/newsletter.ts

@@ -7,21 +7,32 @@ import { makeGroupsSocket } from './groups'
 import { executeWMexQuery as genericExecuteWMexQuery } from './mex'
 
 const parseNewsletterCreateResponse = (response: NewsletterCreateResponse): NewsletterMetadata => {
+	// Validate response structure before destructuring
+	if (!response?.id || !response?.thread_metadata) {
+		throw new Error('Invalid newsletter response: missing id or thread_metadata')
+	}
+
 	const { id, thread_metadata: thread, viewer_metadata: viewer } = response
+
+	// Validate required thread metadata fields
+	if (!thread.name?.text) {
+		throw new Error('Invalid newsletter response: missing thread name')
+	}
+
 	return {
 		id: id,
 		owner: undefined,
 		name: thread.name.text,
-		creation_time: parseInt(thread.creation_time, 10),
-		description: thread.description.text,
-		invite: thread.invite,
-		subscribers: parseInt(thread.subscribers_count, 10),
+		creation_time: parseInt(thread.creation_time, 10) || 0,
+		description: thread.description?.text || '',
+		invite: thread.invite || '',
+		subscribers: parseInt(thread.subscribers_count, 10) || 0,
 		verification: thread.verification,
-		picture: {
-			id: thread.picture.id,
-			directPath: thread.picture.direct_path
-		},
-		mute_state: viewer.mute
+		picture: thread.picture ? {
+			id: thread.picture.id || '',
+			directPath: thread.picture.direct_path || ''
+		} : { id: '', directPath: '' },
+		mute_state: viewer?.mute
 	}
 }